4.MD.C.5

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- 4.MD.C.5Recognize angles as geometric shapes that are formed wherever two rays share a common endpoint, and understand concepts of angle measurement:
- 4.MD.C.6Measure angles in whole-number degrees using a protractor. Sketch angles of specified measure.
- 4.MD.C.7Recognize angle measure as additive. When an angle is decomposed into non-overlapping parts, the angle measure of the whole is the sum of the angle measures of the parts. Solve addition and subtraction problems to find unknown angles on a diagram in real world and mathematical problems, e.g., by using an equation with a symbol for the unknown angle measure.

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4.MD.C.5a

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- 4.MD.C.5aAn angle is measured with reference to a circle with its center at the common endpoint of the rays, by considering the fraction of the circular arc between the points where the two rays intersect the circle. An angle that turns through 1/360 of a circle is called a “one-degree angle,” and can be used to measure angles.
- 4.MD.C.5bAn angle that turns through n one-degree angles is said to have an angle measure of n degrees.

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## 4.MD.C.5a

## An angle is measured with reference to a circle with its center at the common endpoint of the rays, by considering the fraction of the circular arc between the points where the two rays intersect the circle. An angle that turns through 1/360 of a circle is called a “one-degree angle,” and can be used to measure angles.

9 Lesson(s)

### Complementary & Supplementary Angles

4th Grade Math »
Unit: Geometry

4th Grade Math »
Unit: Geometry

### Mini Golf Mystery - Using a Protractor

4th Grade Math »
Unit: Geometry

4th Grade Math »
Unit: Geometry

Big Idea:

#### In this lesson, students are up and out of their seats in an engaging problem solving strategy. Students deepen their understanding about angles as they talk with peers about various strategies to determine angle measurements.

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